Max wolf



(No Model.)

M. WOLF.

BARREL HEATER. V N0. 402,879. Patented May 7,1889.

FIQ.1. P

I Y 1' A V A iii UNITED STATES PATENT OFFICE.

MAX WOLF, OF CINCINNATI, OHIO, ASSIGNOR OF ONE-HALF TO JOSEPH HUBER, OF SAME PLACE.

BARREL-HEATER.

SPECIFICATION forming part of Letters Patent No. 402,879, dated May 7, 1889.

Application filed June 21, 1888. Serial No. 277,809- (No model.)

To all whom it may concern.-

Be it known that I, MAX WOLF, a citizen of the United States of America, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a certain new and useful Improvement in Barrel-Heaters, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to those apparatus which supply a blast of hot air for heating the interiors of casks, barrels, &c., preparatory to lining such vessels with melted pitch or other similarsubstances; and my improvement comprises a novel construction of wa- 4 ter-jacket, which jacket surrounds the furnace, hood, and blast-nozzle of the apparatus, and thus prevents any undue heating of its outer shell, as hereinafter more fully described.

In the annexed drawings, Figure 1 is an axial section of my apparatus taken in the plane of the blast-nozzle. Fig. 2 is an enlarged horizontal section of a portion of the furnace and jacket, said section being taken in the plane of the stay-bolts. Fig. 3 is an enlarged vertical section of a' portion of the lower part of the furnace and jacket, said section being taken in the plane of the waterinlet pipe.

The base-plate A of the apparatus is supported on legs a, and has an ash-pan, A, to which pan is attached a pipe, to, that communicates with a suitable blower.

The furnace proper, B, is a heavy cast cylinder, with an outwardly-projecting annular flange, b, at bottom, and at top a similar flange, b, which flanges are united by a vertical rib, b. O C O are radial lugs projecting from the furnace, which lugs have bolts 0 screwed therein, so as to clamp an outer cylindrical shell, D, against said lugs, and also against the flanges b b and rib b. This shell is composed of a single plate of metal, the vertical edges of which meet at the center of rib b, to which rib said plate is secured by screws or rivets d passing through this plate, and also through a binding-strip, d, as seen in Fig. 2. This construction affords a water-jacket, F, between the shell and furnace.

E E are bands shrunk around the upper and lower portions of the shell, so as to clamp it securely against the edges of the flanges b pipe, f, (seen only in Fig. 3,) the flange I) having an enlargement, b, to afford sufficient metal for the screw-threaded end of said pipe to engage with.

Resting upon the furnace is a dome-shaped hood composed of an outer wall, g, and inner wall, g, with an annular water-space, G, between them, which space communicates with the jacket F by passages or ports g. Proj ecting laterally from this hood is a blastnozzle, H, opening into the furnace B, said nozzle being surrounded by a water-space, h, communicating freely with the Water-space G.

h is an overflow-pipe leading from the water-space h. This hood is attached to the base-plate by tie-rods I, and has at top a feedhole, J, securely closed by a cover, 3'. When the furnace is in operation and a blast of air driven through it, an intense heat is generated; but the water-jacket F prevents this heat being radiated into the room where the men are at work, and by causing a rapid circulation of water to run through the jacket the temperature of the apparatus is reduced to a minimum.

I claim as my invention-- 1. The combination, in a hot-blast apparatus of the class specified, of a furnace having a hollow hood mounted thereon, which hood is provided with a discharge-nozzle for the heated air, said furnace, hood, and nozzle being surrounded by communicating jackets through which water circulates freely, as

.herein described, and for the purpose stated.

2. The combination, in a hot-blast apparatus of the class specified, of the flanged furnace B Z) Z), vertical rib b, outer shell, D, having its edges attached to said rib, and hoops E E, which hoops clamp said shell against the .edges of said flanges I) Z), for the purpose described.

3. The combination, in a hot-blast apparatus of the class specified, of the furnace B, having outwardly-proj ecting lugs O, to which the outer shell, D, is secured by the fasteners c, as herein described.

In testimony whereof I affix my signature in presence of two witnesses.

MAX WOLF.

Witnesses:

JAMES H. LAYMAN, CHRISTIAN WAIS. 

